Polysulfides

By Dr.Swathi Pai on Thursday 11 December 2008 with 0 comments



5 advantages:

  1. good surface detail (low wetting angle)

  2. flows deep into subgingival crevices

  3. superior tear strength

  4. can delay pouring 1 hour

4 disadvantages:

  1. cannot use for severe undercuts (distortion/permanent deformation)

  2. it’s hydrophobic (contact angle of 82)

  3. heat and humidity sensitive

  4. objectionable odor/messy


Contents:

-base: 80-85% polysulfide; 16 % filler

-accelerator: 60-68% lead dioxide

Category: Prosthodontics Notes

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